AssemblyAI
Speech analytics software
Call & contact center software
- Features
- Ease of use
- Ease of management
- Quality of support
- Affordability
- Market presence
Take the quiz to check if AssemblyAI and its alternatives fit your requirements.
Pay-as-you-go
Free Trial unavailable
Free version
Small
Medium
Large
- Information technology and software
- Education and training
- Media and communications
What is AssemblyAI
AssemblyAI is a speech-to-text and speech understanding API used to transcribe and analyze audio and video content. It is typically embedded by developers and product teams into applications for use cases such as call transcription, conversation analytics, media indexing, and voice-of-customer workflows. The product focuses on programmatic access to transcription and higher-level speech insights (for example, summarization and content moderation) rather than providing a full contact center agent desktop or telephony stack.
Developer-first API integration
AssemblyAI is delivered primarily as an API, which fits teams that want to embed speech transcription and analysis into existing products and workflows. This approach can reduce dependence on a single end-user interface and supports custom UX and data pipelines. It aligns well with organizations that already use separate telephony, recording, or contact center platforms and want to add analytics on top.
Broad speech understanding features
Beyond transcription, AssemblyAI provides speech understanding capabilities that can support downstream analytics use cases. Examples include summarization and content-based signals that can be used for QA, compliance review, or customer insight workflows. These features can help teams move from raw transcripts to structured outputs without building all NLP layers from scratch.
Scales for batch processing
The API model supports high-volume, asynchronous processing for large audio libraries such as recorded calls, meetings, or media archives. This is useful for organizations that need to backfill historical recordings or run periodic analytics jobs. It can also support near-real-time use cases when integrated into streaming or post-call pipelines.
Not a full contact center
AssemblyAI does not function as a complete call or contact center platform with native telephony, routing, IVR, workforce management, or agent desktop capabilities. Organizations looking for an end-to-end contact center solution typically need additional systems for call handling and operational workflows. As a result, it is more often used as an embedded analytics layer than a standalone replacement.
Requires engineering resources
Implementation generally requires developer effort to integrate APIs, manage audio ingestion, and operationalize outputs into dashboards or QA processes. Teams without software engineering capacity may find time-to-value longer than packaged contact center analytics tools. Ongoing maintenance (authentication, retries, monitoring, and data governance) also remains the buyer’s responsibility.
Analytics depth depends on build
Many higher-level contact center analytics capabilities (for example, configurable scorecards, coaching workflows, and out-of-the-box KPI reporting) are not provided as a complete application layer. Buyers may need to build or integrate additional components for labeling, review queues, and performance management. This can increase total solution complexity compared with platforms that include these workflows natively.
Plan & Pricing
Pricing model: Pay-as-you-go Free tier/trial: Free tier with up to 185 hours of pre-recorded transcription or 333 hours of streaming; accounts get $50 in free transcription credit on sign-up (free-tier limits described on the vendor site). LLM Gateway is not available on the free tier. (See notes.)
Example costs (selected, official):
- Pre-recorded Speech-to-Text:
- Universal (Async / Default): $0.15/hr.
- Slam-1 (beta, higher-accuracy): $0.27/hr.
- Universal-3 Pro: $0.21/hr.
- Keyterms Prompting (add-on): $0.05/hr (pre-recorded shown as $0.05/hr for prompting on pricing page).
- Streaming Speech-to-Text:
- Universal-Streaming: $0.15/hr.
- Universal-Streaming Multilingual: $0.15/hr.
- Keyterms Prompting (streaming add-on): $0.04/hr.
- Speech Understanding / Audio Intelligence (add-ons):
- Speaker Diarization / Speaker Identification: $0.02/hr.
- Entity Detection: $0.08/hr.
- Sentiment Analysis: $0.02/hr.
- Auto Chapters: $0.08/hr.
- Key Phrases: $0.01/hr.
- Topic Detection: $0.15/hr.
- Summarization: $0.03/hr.
- PII Audio Redaction: $0.05/hr.
- PII Redaction (text): $0.08/hr.
- Content Moderation: $0.15/hr.
- Profanity Filtering (Guardrails): $0.01/hr.
- LLM Gateway (token-based examples):
- GPT-5.2: $1.75 / 1M tokens (input); $14.00 / 1M tokens (output).
- GPT-5 / GPT-5.1: $1.25 / 1M tokens (input); $10.00 / 1M tokens (output).
- GPT-5-Mini: $0.25 / 1M tokens (input); $2.00 / 1M tokens (output).
- (Multiple other LLM options listed on pricing page with per-1M-token input/output rates.)
Discount options: Volume/enterprise discounts and custom tiered pricing are available by contacting AssemblyAI (enterprise/custom rates & dedicated SLAs).
Notes / caveats: All pricing above is usage-based (hourly or per-1M tokens). The pricing page also notes some rates are offered subject to participation in their model improvement program and enterprise/custom tiers are available by contacting sales. All rates taken directly from AssemblyAI’s official pricing pages and docs.
Seller details
AssemblyAI, Inc.
San Francisco, CA, USA
2017
Private
https://www.assemblyai.com/
https://x.com/AssemblyAI
https://www.linkedin.com/company/assemblyai/
